This is shade #54, Deepest Teal, from the Filatura di Crosa Nirvana range. I would describe this as emerald green rather than teal.
Nirvana is 100% extra fine Merino wool that has been mercerised to give it a cashmere-like softness.
It is ideal for lace knitting and, being machine washable, is very practical.
There are patterns for Nirvana in Filatura's Golden Line
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